<html>
<head>
 <title>标题示例</title>
 </head>
<body>
 <h1 style="color:red">一级标题</h1>
 <h2 style="color:blue">二级标题</h2>
 <h3 style="color:green">三级标题</h3>
 <h4 style="color:#ffa500">四级标题</h4>
 <h5 style="color:#cd061f">五级标题</h5>
</body>
</html>